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When it comes to high-speed grinding and, precision machining, selecting the proper abrasive wheel is of the essence. Two of the most simulating materials in such domain are diamond and CBN. Although both are super — abrasives, they each have unique characteristics, making them applicable to a variety of industries. Being aware of the main differences in their hardness, wear resistance and their effects on machining accuracy is crucial to help your manufacturing processes become more efficient. Being a professional manufacturer, Zhengzhou Ruizuan Diamond Tool Co., Ltd would like to offer you more useful information and premium quality products as per your requirement.
Material Hardness and Application Suitability
Diamond and CBN wheels have a simple difference based on the inherent hardness property of its material. Diamond is the hardest material in the world. This hardness also makes diamonds an ideal material for use in grinding hard and brittle materials such as glass, ceramics, quartz, pottery and semiconductor materials. They are the tool of choice on cemented carbide such as tungsten, silicon, cemented carbide or steels that turn more highly abrasive in higher speed ranges. They be used to grind the difficult-to-machine materials efficiently because the diamond grains have extremely sharp edges.
Cubic Boron Nitride on the other hand is the world's second hardest material; second only to Diamond. Its greatest merit, however, is its chemical stability on ferrous metal contact. Although diamond is hard, it can chemically react with iron in the temperature range of 900–1300 °C (at atmospheric pressure) to form an iron carbide layer that is more than six times its original volume. This results in an extremely short working life for the diamond wheel when cutting steel. That is what CBN wheels are best at. They are especially formulated for grinding hard ferrous metals, such as stainless and tool steels, dies and die steels, cast irons (both gray & ductile), high-alloy ferrous metals like nickel-based superalloys, not to mention exotic metals. The hardness of CBN means those very same tough materials being ground can be cut while resisting the wear that occurs with diamond grinding.
Wear Resistance and Tool Longevity
Longevity of the tool and operational cost are closely related to wear resistance which is directly due to hardiness and chemical stability. Diamond wheels provide excellent wear resistance if used on the correct non-ferrous materials. Their shape-holding features mean you can expect long life and peak performance, which boosts your productivity in such operations as carbide tool grinding, ceramic component grinding, glass and quartz grinding, and other applications.
In Ferrous metal grinding, CBN wheels will provide the best w ear resistance and consistent quality in the industry. As they are not chemically reactive with iron, the abrasive grains do not break down as readily and for this reason are preferred for longer lasting wheels that incur less wear. The result is an even longer wheel life - 50%+ longer than aluminum oxide wheels when grinding hard steels. The wheel retains its shape over time, cutting off dressing and replacement downtime, while resulting in impressive efficiencies when grinding high volume parts. for a process that uses hardened steel components, longer wheel life is the same as higher efficiency and less cost per part, when you buy CBN wheels from a reliable company such as Zhengzhou Ruizuan Diamond Tool Co., Ltd.
Obtaining Very High Accuracy and a Good Surface Quality
The objective of using super abrasive wheels is to obtain maximum precision and finish. What is important here, is the decision between diamond and CBN. Diamond wheels are so durable that they can grind even the hardest and most challenging materials including tungsten carbide and ceramics. Their ability to perform cutting processes in a clean, precise way without generating too much subsurface-damage is important for the integrity of components such as optical glass and technical ceramics.
For grinding ferrous materials, CBN is highly recommended. Excellent wear resistance allows the wheel profile to hold accurate through the life of a long-lasting grinding wheel, available from the first part to last. The tough and heat-polymerized CBN crystals create less heat in usage than diamond, thereby preventing thermal damage to the work piece, which will occur by burns and microcracks. This provides a fine surface appearance, good part quality and a heightened fatigue life for the end use part. Such precision is critical in fields including automotive and aerospace, which demand high performance from every piece.
In summary – the question of a diamond wheel vs. CBN for grinding is not a question of which is better but which works better for your application and material. Whereas diamond is king for hard and brittle non-ferrous materials, CBN has no peer among abrasive grains when it comes to ferrous hard metals! Good judgment in the level of hardness, wear resistance and specific precision, balancing technology is to meet your procurement needs for the best choice. Zhengzhou Ruizuan Diamond Tool Co., Ltd. applies decades of both knowledge and experience to construct the best abrasive solution for all grinding operations Choosing the correct product is only part of efficiency, quality virtue which has made by our products factory mean money in end customers.